/*
 * Tencent is pleased to support the open source community by making BK-CI 蓝鲸持续集成平台 available.
 *
 * Copyright (C) 2019 THL A29 Limited, a Tencent company.  All rights reserved.
 *
 * BK-CI 蓝鲸持续集成平台 is licensed under the MIT license.
 *
 * A copy of the MIT License is included in this file.
 *
 *
 * Terms of the MIT License:
 * ---------------------------------------------------
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy,
 * modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
 * LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
 * NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

package com.tencent.devops.worker.common.utils

import com.tencent.devops.worker.common.CommonEnv
import com.tencent.devops.worker.common.WORKSPACE_ENV
import com.tencent.devops.worker.common.task.script.ScriptEnvUtils
import org.slf4j.LoggerFactory
import java.io.File
import java.nio.charset.Charset

object BatScriptUtil {
    private const val setEnv = ":setEnv\r\n" +
        "    set file_save_dir=\"##resultFile##\"\r\n" +
        "    echo %~1=%~2 >>%file_save_dir%\r\n" +
        "    set %~1=%~2\r\n" +
        "    goto:eof\r\n"

    private const val setGateValue = ":setGateValue\r\n" +
        "    set file_save_dir=\"##gateValueFile##\"\r\n" +
        "    echo %~1=%~2 >>%file_save_dir%\r\n" +
        "    set %~1=%~2\r\n" +
        "    goto:eof\r\n"

    private val logger = LoggerFactory.getLogger(BatScriptUtil::class.java)
    private val specialKey = listOf<String>()
    private val specialValue = listOf("\n", "\r")
    private val escapeValue = mapOf(
        "&" to "^&",
        "<" to "^<",
        ">" to "^>",
        "|" to "^|",
        "\"" to "\\\""
    )

    fun execute(
        buildId: String,
        script: String,
        runtimeVariables: Map<String, String>,
        dir: File,
        systemEnvVariables: Map<String, String>? = null,
        prefix: String = ""
    ): String {
        try {
            val file = getCommandFile(buildId, script, runtimeVariables, dir, systemEnvVariables)
            return CommandLineUtils.execute("cmd.exe /C \"${file.canonicalPath}\"", dir, true, prefix)
        } catch (e: Throwable) {
            logger.warn("Fail to execute bat script $script", e)
            throw e
        }
    }

    fun getCommandFile(
        buildId: String,
        script: String,
        runtimeVariables: Map<String, String>,
        dir: File,
        systemEnvVariables: Map<String, String>? = null
    ): File {
        val tmpDir = System.getProperty("java.io.tmpdir")
        val file = if (tmpDir.isNullOrBlank()) {
            File.createTempFile("paas_build_script_", ".bat")
        } else {
            File(tmpDir).mkdirs()
            File.createTempFile("paas_build_script_", ".bat", File(tmpDir))
        }
        file.deleteOnExit()

        val command = StringBuilder()

        command.append("@echo off")
            .append("\r\n")
            .append("set $WORKSPACE_ENV=${dir.absolutePath}\r\n")
            .append("set DEVOPS_BUILD_SCRIPT_FILE=${file.absolutePath}\r\n")
            .append("\r\n")

        runtimeVariables.plus(CommonEnv.getCommonEnv())
            .filter { !specialEnv(it.key, it.value) }
            .forEach { (name, value) ->
                // 特殊保留字符转义
                val clean = escapeEnv(value)
                command.append("set $name=\"$clean\"\r\n") // 双引号防止变量值有空格而意外截断定义
                command.append("set $name=%$name:~1,-1%\r\n") // 去除双引号，防止被程序读到有双引号的变量值
            }

        command.append(script.replace("\n", "\r\n"))
            .append("\r\n")
            .append("exit")
            .append("\r\n")
            .append(setEnv.replace("##resultFile##", File(dir, ScriptEnvUtils.getEnvFile(buildId)).absolutePath))
            .append(setGateValue.replace("##gateValueFile##", File(dir, ScriptEnvUtils.getQualityGatewayEnvFile()).canonicalPath))

        val charset = Charset.defaultCharset()
        logger.info("The default charset is $charset")

        file.writeText(command.toString(), charset)
        logger.info("start to run windows script - ($command)")
        return file
    }

    private fun specialEnv(key: String, value: String): Boolean {
        specialKey.forEach {
            if (key.contains(it)) {
                return true
            }
        }

        specialValue.forEach {
            if (value.contains(it)) {
                return true
            }
        }
        return false
    }

    private fun escapeEnv(value: String): String {
        var result = value
        escapeValue.forEach { (k, v) ->
            result = result.replace(k, v)
        }
        return result
    }
}
